/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:40:42,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:40:42,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:40:42,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:40:42,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:40:42,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:40:42,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:40:42,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:40:42,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:40:42,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:40:42,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:40:42,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:40:42,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:40:42,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:40:42,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:40:42,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:40:42,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:40:42,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:40:42,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:40:42,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:40:42,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:40:42,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:40:42,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:40:42,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:40:42,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 05:40:42,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 05:40:42,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 05:40:42,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 05:40:42,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 05:40:42,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 05:40:42,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:40:42,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:40:42,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:40:42,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:40:42,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:40:42,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:40:42,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:40:42,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:40:42,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:40:42,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:40:42,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:40:42,647 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:40:42,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:40:42,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:40:42,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:40:42,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:40:42,676 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:40:42,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:40:42,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:40:42,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:40:42,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:40:42,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:40:42,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:40:42,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:40:42,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:40:42,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:40:42,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:40:42,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:40:42,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:40:42,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:40:42,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:40:42,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:40:42,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:40:42,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:40:42,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:40:42,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:40:42,680 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:40:42,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:40:43,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:40:43,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:40:43,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:40:43,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:40:43,178 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:40:43,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c [2020-12-22 05:40:43,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5278e70ff/06c25a37308f4f05bb1bbf08acd42108/FLAG3bb871ed3 [2020-12-22 05:40:43,965 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:40:43,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c [2020-12-22 05:40:43,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5278e70ff/06c25a37308f4f05bb1bbf08acd42108/FLAG3bb871ed3 [2020-12-22 05:40:44,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5278e70ff/06c25a37308f4f05bb1bbf08acd42108 [2020-12-22 05:40:44,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:40:44,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:40:44,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:40:44,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:40:44,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:40:44,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dae6317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44, skipping insertion in model container [2020-12-22 05:40:44,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:40:44,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:40:44,569 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c[458,471] [2020-12-22 05:40:44,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:40:44,595 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:40:44,609 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c[458,471] [2020-12-22 05:40:44,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:40:44,632 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:40:44,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44 WrapperNode [2020-12-22 05:40:44,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:40:44,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:40:44,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:40:44,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:40:44,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:40:44,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:40:44,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:40:44,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:40:44,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (1/1) ... [2020-12-22 05:40:44,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:40:44,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:40:44,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:40:44,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:40:44,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:40:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:40:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:40:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:40:44,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:40:45,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:40:45,070 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 05:40:45,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:45 BoogieIcfgContainer [2020-12-22 05:40:45,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:40:45,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:40:45,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:40:45,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:40:45,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:40:44" (1/3) ... [2020-12-22 05:40:45,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cb052a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:40:45, skipping insertion in model container [2020-12-22 05:40:45,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:44" (2/3) ... [2020-12-22 05:40:45,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cb052a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:40:45, skipping insertion in model container [2020-12-22 05:40:45,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:45" (3/3) ... [2020-12-22 05:40:45,082 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound10.c [2020-12-22 05:40:45,089 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:40:45,095 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:40:45,152 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:40:45,184 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:40:45,185 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:40:45,185 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:40:45,185 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:40:45,185 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:40:45,186 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:40:45,186 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:40:45,186 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:40:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-22 05:40:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:40:45,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:45,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:45,259 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:45,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-22 05:40:45,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:45,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920177393] [2020-12-22 05:40:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920177393] [2020-12-22 05:40:45,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:40:45,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:40:45,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890965807] [2020-12-22 05:40:45,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:40:45,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:45,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:40:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:40:45,489 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-22 05:40:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:45,509 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-12-22 05:40:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:40:45,511 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 05:40:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:45,520 INFO L225 Difference]: With dead ends: 39 [2020-12-22 05:40:45,521 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 05:40:45,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:40:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 05:40:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 05:40:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 05:40:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 05:40:45,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2020-12-22 05:40:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:45,563 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 05:40:45,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:40:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 05:40:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:40:45,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:45,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:45,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:40:45,564 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:45,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-22 05:40:45,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:45,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876782823] [2020-12-22 05:40:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:45,586 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:45,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084360326] [2020-12-22 05:40:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:40:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:45,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876782823] [2020-12-22 05:40:45,800 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:45,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084360326] [2020-12-22 05:40:45,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:40:45,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:40:45,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345907023] [2020-12-22 05:40:45,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:40:45,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:45,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:40:45,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:40:45,804 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-12-22 05:40:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:45,958 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-22 05:40:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:40:45,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 05:40:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:45,963 INFO L225 Difference]: With dead ends: 31 [2020-12-22 05:40:45,963 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 05:40:45,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:40:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 05:40:45,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-22 05:40:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:40:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-22 05:40:45,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2020-12-22 05:40:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:45,980 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-22 05:40:45,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:40:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-22 05:40:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:40:45,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:45,981 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:46,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:40:46,196 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:46,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2020-12-22 05:40:46,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:46,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110603315] [2020-12-22 05:40:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:46,216 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:46,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710781596] [2020-12-22 05:40:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:46,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:40:46,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:46,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110603315] [2020-12-22 05:40:46,398 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:46,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710781596] [2020-12-22 05:40:46,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:46,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:40:46,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495996987] [2020-12-22 05:40:46,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:40:46,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:46,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:40:46,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:40:46,404 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2020-12-22 05:40:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:46,578 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 05:40:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:40:46,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 05:40:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:46,580 INFO L225 Difference]: With dead ends: 34 [2020-12-22 05:40:46,580 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 05:40:46,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:40:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 05:40:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-12-22 05:40:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 05:40:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-22 05:40:46,588 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2020-12-22 05:40:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:46,588 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-22 05:40:46,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:40:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-22 05:40:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:40:46,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:46,589 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:46,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:46,805 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:46,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2020-12-22 05:40:46,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:46,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578636575] [2020-12-22 05:40:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:46,825 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:46,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558657267] [2020-12-22 05:40:46,829 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:46,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:40:46,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:46,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 05:40:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:47,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578636575] [2020-12-22 05:40:47,081 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:47,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558657267] [2020-12-22 05:40:47,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:47,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:40:47,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21839591] [2020-12-22 05:40:47,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:40:47,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:47,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:40:47,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:40:47,084 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-12-22 05:40:47,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:47,168 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-22 05:40:47,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:40:47,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 05:40:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:47,169 INFO L225 Difference]: With dead ends: 41 [2020-12-22 05:40:47,170 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 05:40:47,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:40:47,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 05:40:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-22 05:40:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:40:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 05:40:47,177 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2020-12-22 05:40:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:47,177 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 05:40:47,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:40:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 05:40:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:40:47,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:47,178 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:47,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:47,392 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:47,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2052638844, now seen corresponding path program 1 times [2020-12-22 05:40:47,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:47,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004805778] [2020-12-22 05:40:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:47,413 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:47,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489085752] [2020-12-22 05:40:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:47,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 05:40:47,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:47,541 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:40:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:47,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004805778] [2020-12-22 05:40:47,554 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:47,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489085752] [2020-12-22 05:40:47,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:47,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:40:47,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597178280] [2020-12-22 05:40:47,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:40:47,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:47,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:40:47,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:40:47,557 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-22 05:40:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:47,755 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-22 05:40:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:40:47,755 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 05:40:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:47,756 INFO L225 Difference]: With dead ends: 32 [2020-12-22 05:40:47,757 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 05:40:47,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:40:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 05:40:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 05:40:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:40:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-22 05:40:47,764 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 13 [2020-12-22 05:40:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:47,764 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-22 05:40:47,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:40:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-22 05:40:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:40:47,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:47,765 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:47,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:47,980 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:47,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2020-12-22 05:40:47,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:47,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614795047] [2020-12-22 05:40:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:48,000 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:48,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219163385] [2020-12-22 05:40:48,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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