/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:48:07,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:48:07,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:48:07,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:48:07,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:48:07,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:48:07,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:48:07,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:48:07,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:48:07,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:48:07,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:48:07,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:48:07,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:48:07,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:48:07,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:48:07,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:48:07,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:48:07,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:48:07,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:48:07,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:48:07,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:48:07,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:48:07,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:48:07,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:48:07,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:48:07,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:48:07,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:48:07,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:48:07,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:48:07,659 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:48:07,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:48:07,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:48:07,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:48:07,665 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:48:07,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:48:07,666 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:48:07,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:48:07,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:48:07,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:48:07,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:48:07,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:48:07,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:48:07,669 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:48:07,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:48:07,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:48:07,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:48:07,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:48:07,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:48:07,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:48:07,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:48:07,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:48:07,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:48:07,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:48:07,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:48:07,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:48:07,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:48:07,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:48:07,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:48:07,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:48:08,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:48:08,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:48:08,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:48:08,159 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:48:08,160 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:48:08,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps3.c [2020-11-06 22:48:08,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c2187e45/dbb4f1b769424aaea99e08e6282d7fef/FLAGcf471808b [2020-11-06 22:48:08,876 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:48:08,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3.c [2020-11-06 22:48:08,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c2187e45/dbb4f1b769424aaea99e08e6282d7fef/FLAGcf471808b [2020-11-06 22:48:09,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c2187e45/dbb4f1b769424aaea99e08e6282d7fef [2020-11-06 22:48:09,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:48:09,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:48:09,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:48:09,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:48:09,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:48:09,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:09" (1/1) ... [2020-11-06 22:48:09,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a8484fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09, skipping insertion in model container [2020-11-06 22:48:09,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:09" (1/1) ... [2020-11-06 22:48:09,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:48:09,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:48:09,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:48:09,509 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:48:09,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:48:09,550 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:48:09,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09 WrapperNode [2020-11-06 22:48:09,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:48:09,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:48:09,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:48:09,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:48:09,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09" (1/1) ... [2020-11-06 22:48:09,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09" (1/1) ... [2020-11-06 22:48:09,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09" (1/1) ... [2020-11-06 22:48:09,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09" (1/1) ... [2020-11-06 22:48:09,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09" (1/1) ... [2020-11-06 22:48:09,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09" (1/1) ... [2020-11-06 22:48:09,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09" (1/1) ... [2020-11-06 22:48:09,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:48:09,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:48:09,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:48:09,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:48:09,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09" (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 [2020-11-06 22:48:09,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:48:09,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:48:09,698 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:48:09,698 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:48:09,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:48:09,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:48:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:48:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:48:09,699 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:48:09,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:48:09,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:48:09,701 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:48:09,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:48:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:48:09,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:48:09,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:48:09,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:48:09,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:48:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:48:09,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:48:10,186 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:48:10,187 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:48:10,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:10 BoogieIcfgContainer [2020-11-06 22:48:10,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:48:10,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:48:10,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:48:10,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:48:10,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:48:09" (1/3) ... [2020-11-06 22:48:10,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac40264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:10, skipping insertion in model container [2020-11-06 22:48:10,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:09" (2/3) ... [2020-11-06 22:48:10,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac40264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:10, skipping insertion in model container [2020-11-06 22:48:10,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:10" (3/3) ... [2020-11-06 22:48:10,218 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3.c [2020-11-06 22:48:10,230 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:48:10,233 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:48:10,244 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:48:10,267 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:48:10,268 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:48:10,268 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:48:10,268 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:48:10,268 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:48:10,268 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:48:10,269 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:48:10,269 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:48:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-06 22:48:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:48:10,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:48:10,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:48:10,299 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:48:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:48:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash 619537921, now seen corresponding path program 1 times [2020-11-06 22:48:10,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:48:10,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891783945] [2020-11-06 22:48:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:48:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:48:10,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:48:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:48:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:48:10,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891783945] [2020-11-06 22:48:10,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:48:10,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:48:10,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84368120] [2020-11-06 22:48:10,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:48:10,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:48:10,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:48:10,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:48:10,632 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-11-06 22:48:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:48:10,716 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-11-06 22:48:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:48:10,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-06 22:48:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:48:10,728 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:48:10,728 INFO L226 Difference]: Without dead ends: 17 [2020-11-06 22:48:10,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:48:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-06 22:48:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-06 22:48:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:48:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-06 22:48:10,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-11-06 22:48:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:48:10,779 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-06 22:48:10,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:48:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-06 22:48:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:48:10,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:48:10,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:48:10,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:48:10,781 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:48:10,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:48:10,782 INFO L82 PathProgramCache]: Analyzing trace with hash 674949181, now seen corresponding path program 1 times [2020-11-06 22:48:10,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:48:10,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778129521] [2020-11-06 22:48:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:48:10,804 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:48:10,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111874263] [2020-11-06 22:48:10,805 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 [2020-11-06 22:48:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:48:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:48:10,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:48:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:48:10,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778129521] [2020-11-06 22:48:10,960 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:48:10,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111874263] [2020-11-06 22:48:10,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:48:10,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:48:10,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524429955] [2020-11-06 22:48:10,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:48:10,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:48:10,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:48:10,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:48:10,964 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-11-06 22:48:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:48:11,018 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-06 22:48:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:48:11,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-06 22:48:11,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:48:11,020 INFO L225 Difference]: With dead ends: 28 [2020-11-06 22:48:11,021 INFO L226 Difference]: Without dead ends: 24 [2020-11-06 22:48:11,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:48:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-06 22:48:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-06 22:48:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-06 22:48:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-06 22:48:11,034 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 12 [2020-11-06 22:48:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:48:11,035 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-06 22:48:11,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:48:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-06 22:48:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:48:11,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:48:11,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:48:11,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:48:11,251 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:48:11,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:48:11,253 INFO L82 PathProgramCache]: Analyzing trace with hash -722961082, now seen corresponding path program 1 times [2020-11-06 22:48:11,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:48:11,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491901635] [2020-11-06 22:48:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:48:11,272 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:48:11,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543747469] [2020-11-06 22:48:11,273 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 [2020-11-06 22:48:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:48:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-06 22:48:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:48:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:48:11,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491901635] [2020-11-06 22:48:11,421 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:48:11,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543747469] [2020-11-06 22:48:11,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:48:11,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-06 22:48:11,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266461085] [2020-11-06 22:48:11,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:48:11,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:48:11,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:48:11,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:48:11,425 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-11-06 22:48:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:48:11,501 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-11-06 22:48:11,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:48:11,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-06 22:48:11,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:48:11,504 INFO L225 Difference]: With dead ends: 35 [2020-11-06 22:48:11,504 INFO L226 Difference]: Without dead ends: 31 [2020-11-06 22:48:11,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:48:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-06 22:48:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-06 22:48:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-06 22:48:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-11-06 22:48:11,517 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 19 [2020-11-06 22:48:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:48:11,518 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-11-06 22:48:11,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:48:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-11-06 22:48:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-06 22:48:11,519 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:48:11,520 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:48:11,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:48:11,734 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:48:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:48:11,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1314661347, now seen corresponding path program 2 times [2020-11-06 22:48:11,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:48:11,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256657354] [2020-11-06 22:48:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:48:11,759 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:48:11,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382442503] [2020-11-06 22:48:11,760 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 [2020-11-06 22:48:11,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:48:11,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:48:11,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-06 22:48:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:48:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:48:12,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256657354] [2020-11-06 22:48:12,036 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:48:12,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382442503] [2020-11-06 22:48:12,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:48:12,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-06 22:48:12,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120060130] [2020-11-06 22:48:12,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:48:12,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:48:12,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:48:12,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:48:12,039 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2020-11-06 22:48:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:48:12,227 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-11-06 22:48:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:48:12,228 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-11-06 22:48:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:48:12,229 INFO L225 Difference]: With dead ends: 42 [2020-11-06 22:48:12,229 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:48:12,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:48:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:48:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-06 22:48:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:48:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-06 22:48:12,244 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 26 [2020-11-06 22:48:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:48:12,244 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-06 22:48:12,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:48:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-06 22:48:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:48:12,246 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:48:12,246 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:48:12,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:48:12,461 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:48:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:48:12,463 INFO L82 PathProgramCache]: Analyzing trace with hash 153054566, now seen corresponding path program 3 times [2020-11-06 22:48:12,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:48:12,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882455455] [2020-11-06 22:48:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:48:12,488 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:48:12,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497066387] [2020-11-06 22:48:12,488 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 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