/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-b8ad66e [2020-10-23 18:51:36,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:51:36,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:51:36,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:51:36,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:51:36,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:51:36,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:51:36,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:51:36,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:51:36,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:51:36,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:51:36,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:51:36,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:51:36,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:51:36,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:51:36,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:51:36,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:51:36,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:51:36,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:51:36,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:51:36,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:51:36,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:51:36,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:51:36,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:51:37,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:51:37,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:51:37,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:51:37,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:51:37,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:51:37,093 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:51:37,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:51:37,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:51:37,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:51:37,095 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:51:37,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:51:37,096 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:51:37,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:51:37,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:51:37,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:51:37,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:51:37,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:51:37,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:51:37,099 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:51:37,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:51:37,100 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:51:37,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:51:37,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:51:37,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:51:37,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:51:37,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:51:37,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:51:37,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:51:37,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:51:37,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:51:37,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:51:37,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:51:37,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:51:37,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:51:37,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:51:37,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:51:37,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:51:37,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:51:37,519 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:51:37,520 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:51:37,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps3.c [2020-10-23 18:51:37,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c9247bc3/c60e0f6b541449b4ac869239caf221bd/FLAGa6b0b1543 [2020-10-23 18:51:38,208 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:51:38,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3.c [2020-10-23 18:51:38,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c9247bc3/c60e0f6b541449b4ac869239caf221bd/FLAGa6b0b1543 [2020-10-23 18:51:38,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c9247bc3/c60e0f6b541449b4ac869239caf221bd [2020-10-23 18:51:38,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:51:38,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:51:38,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:51:38,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:51:38,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:51:38,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:51:38" (1/1) ... [2020-10-23 18:51:38,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5068490a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38, skipping insertion in model container [2020-10-23 18:51:38,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:51:38" (1/1) ... [2020-10-23 18:51:38,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:51:38,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:51:38,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:51:38,860 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:51:38,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:51:38,898 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:51:38,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38 WrapperNode [2020-10-23 18:51:38,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:51:38,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:51:38,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:51:38,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:51:38,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38" (1/1) ... [2020-10-23 18:51:38,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38" (1/1) ... [2020-10-23 18:51:38,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38" (1/1) ... [2020-10-23 18:51:38,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38" (1/1) ... [2020-10-23 18:51:38,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38" (1/1) ... [2020-10-23 18:51:38,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38" (1/1) ... [2020-10-23 18:51:38,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38" (1/1) ... [2020-10-23 18:51:38,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:51:38,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:51:38,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:51:38,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:51:38,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:51:39,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:51:39,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:51:39,016 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:51:39,016 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:51:39,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:51:39,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:51:39,017 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:51:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:51:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:51:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:51:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:51:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:51:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:51:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:51:39,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:51:39,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:51:39,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:51:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:51:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:51:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:51:39,329 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:51:39,330 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:51:39,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:51:39 BoogieIcfgContainer [2020-10-23 18:51:39,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:51:39,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:51:39,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:51:39,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:51:39,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:51:38" (1/3) ... [2020-10-23 18:51:39,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f078b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:51:39, skipping insertion in model container [2020-10-23 18:51:39,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:51:38" (2/3) ... [2020-10-23 18:51:39,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f078b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:51:39, skipping insertion in model container [2020-10-23 18:51:39,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:51:39" (3/3) ... [2020-10-23 18:51:39,341 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3.c [2020-10-23 18:51:39,355 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:51:39,361 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:51:39,383 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:51:39,443 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:51:39,443 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:51:39,443 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:51:39,443 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:51:39,443 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:51:39,444 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:51:39,444 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:51:39,444 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:51:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-23 18:51:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:51:39,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:51:39,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:51:39,470 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:51:39,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:51:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash 619537921, now seen corresponding path program 1 times [2020-10-23 18:51:39,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:51:39,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376643887] [2020-10-23 18:51:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:51:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:51:39,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:51:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:51:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:51:39,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376643887] [2020-10-23 18:51:39,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:51:39,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:51:39,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218462859] [2020-10-23 18:51:39,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:51:39,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:51:39,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:51:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:51:39,930 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-23 18:51:40,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:51:40,033 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-23 18:51:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:51:40,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-23 18:51:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:51:40,051 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:51:40,053 INFO L226 Difference]: Without dead ends: 17 [2020-10-23 18:51:40,059 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 [2020-10-23 18:51:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-23 18:51:40,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-23 18:51:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-23 18:51:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-23 18:51:40,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-10-23 18:51:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:51:40,124 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-23 18:51:40,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:51:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-23 18:51:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:51:40,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:51:40,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:51:40,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:51:40,127 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:51:40,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:51:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash 674949181, now seen corresponding path program 1 times [2020-10-23 18:51:40,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:51:40,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374627967] [2020-10-23 18:51:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:51:40,177 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:51:40,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201722058] [2020-10-23 18:51:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:51:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:51:40,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:51:40,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:51:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:51:40,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374627967] [2020-10-23 18:51:40,386 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:51:40,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201722058] [2020-10-23 18:51:40,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:51:40,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:51:40,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878766174] [2020-10-23 18:51:40,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:51:40,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:51:40,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:51:40,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:51:40,392 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-23 18:51:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:51:40,476 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-23 18:51:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:51:40,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-23 18:51:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:51:40,478 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:51:40,478 INFO L226 Difference]: Without dead ends: 24 [2020-10-23 18:51:40,479 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 [2020-10-23 18:51:40,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-23 18:51:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-23 18:51:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-23 18:51:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-23 18:51:40,490 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 12 [2020-10-23 18:51:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:51:40,490 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-23 18:51:40,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:51:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-23 18:51:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:51:40,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:51:40,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:51:40,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:51:40,706 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:51:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:51:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash -722961082, now seen corresponding path program 1 times [2020-10-23 18:51:40,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:51:40,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307371651] [2020-10-23 18:51:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:51:40,722 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:51:40,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113690547] [2020-10-23 18:51:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:51:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:51:40,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-23 18:51:40,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:51:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:51:40,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307371651] [2020-10-23 18:51:40,859 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:51:40,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113690547] [2020-10-23 18:51:40,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:51:40,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-23 18:51:40,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977214735] [2020-10-23 18:51:40,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:51:40,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:51:40,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:51:40,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:51:40,862 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-10-23 18:51:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:51:40,931 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-23 18:51:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:51:40,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-23 18:51:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:51:40,933 INFO L225 Difference]: With dead ends: 35 [2020-10-23 18:51:40,933 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 18:51:40,934 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 [2020-10-23 18:51:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 18:51:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-23 18:51:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 18:51:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-23 18:51:40,944 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 19 [2020-10-23 18:51:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:51:40,945 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-23 18:51:40,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:51:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-23 18:51:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:51:40,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:51:40,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:51:41,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:51:41,161 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:51:41,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:51:41,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1314661347, now seen corresponding path program 2 times [2020-10-23 18:51:41,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:51:41,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740972082] [2020-10-23 18:51:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:51:41,192 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:51:41,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928985435] [2020-10-23 18:51:41,193 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 [2020-10-23 18:51:41,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:51:41,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:51:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:51:41,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:51:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:51:41,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740972082] [2020-10-23 18:51:41,442 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:51:41,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928985435] [2020-10-23 18:51:41,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:51:41,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-23 18:51:41,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594417631] [2020-10-23 18:51:41,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:51:41,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:51:41,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:51:41,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:51:41,446 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2020-10-23 18:51:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:51:41,622 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-23 18:51:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:51:41,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-23 18:51:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:51:41,627 INFO L225 Difference]: With dead ends: 42 [2020-10-23 18:51:41,627 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:51:41,628 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 [2020-10-23 18:51:41,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:51:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:51:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:51:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 18:51:41,646 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 26 [2020-10-23 18:51:41,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:51:41,646 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 18:51:41,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:51:41,646 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 18:51:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:51:41,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:51:41,649 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:51:41,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:51:41,865 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:51:41,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:51:41,866 INFO L82 PathProgramCache]: Analyzing trace with hash 153054566, now seen corresponding path program 3 times [2020-10-23 18:51:41,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:51:41,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694553616] [2020-10-23 18:51:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:51:41,880 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:51:41,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564273561] [2020-10-23 18:51:41,881 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