/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/geo3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:23:30,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:23:30,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:23:30,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:23:30,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:23:30,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:23:30,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:23:30,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:23:30,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:23:30,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:23:30,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:23:30,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:23:30,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:23:31,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:23:31,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:23:31,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:23:31,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:23:31,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:23:31,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:23:31,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:23:31,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:23:31,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:23:31,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:23:31,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:23:31,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:23:31,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:23:31,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:23:31,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:23:31,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:23:31,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:23:31,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:23:31,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:23:31,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:23:31,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:23:31,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:23:31,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:23:31,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:23:31,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:23:31,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:23:31,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:23:31,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:23:31,108 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:23:31,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:23:31,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:23:31,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:23:31,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:23:31,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:23:31,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:23:31,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:23:31,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:23:31,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:23:31,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:23:31,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:23:31,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:23:31,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:23:31,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:23:31,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:23:31,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:23:31,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:23:31,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:23:31,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:23:31,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:23:31,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:23:31,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:23:31,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:23:31,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:23:31,573 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:23:31,573 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:23:31,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c [2020-12-22 05:23:31,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/849915cf2/24bf9bbe5f0946799f5e7dd8b2a81058/FLAG6b3de8393 [2020-12-22 05:23:32,222 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:23:32,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_unwindbound10.c [2020-12-22 05:23:32,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/849915cf2/24bf9bbe5f0946799f5e7dd8b2a81058/FLAG6b3de8393 [2020-12-22 05:23:32,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/849915cf2/24bf9bbe5f0946799f5e7dd8b2a81058 [2020-12-22 05:23:32,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:23:32,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:23:32,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:23:32,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:23:32,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:23:32,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@711792ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32, skipping insertion in model container [2020-12-22 05:23:32,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:23:32,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:23:32,800 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/geo3-ll_unwindbound10.c[525,538] [2020-12-22 05:23:32,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:23:32,826 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:23:32,841 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/geo3-ll_unwindbound10.c[525,538] [2020-12-22 05:23:32,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:23:32,863 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:23:32,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32 WrapperNode [2020-12-22 05:23:32,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:23:32,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:23:32,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:23:32,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:23:32,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:23:32,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:23:32,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:23:32,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:23:32,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (1/1) ... [2020-12-22 05:23:32,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:23:32,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:23:32,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:23:32,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:23:32,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (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 05:23:33,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:23:33,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:23:33,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:23:33,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:23:33,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:23:33,286 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 05:23:33,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:23:33 BoogieIcfgContainer [2020-12-22 05:23:33,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:23:33,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:23:33,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:23:33,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:23:33,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:23:32" (1/3) ... [2020-12-22 05:23:33,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68eaff5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:23:33, skipping insertion in model container [2020-12-22 05:23:33,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:23:32" (2/3) ... [2020-12-22 05:23:33,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68eaff5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:23:33, skipping insertion in model container [2020-12-22 05:23:33,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:23:33" (3/3) ... [2020-12-22 05:23:33,298 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound10.c [2020-12-22 05:23:33,305 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:23:33,310 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:23:33,379 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:23:33,461 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:23:33,461 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:23:33,461 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:23:33,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:23:33,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:23:33,462 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:23:33,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:23:33,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:23:33,478 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-22 05:23:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 05:23:33,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:23:33,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 05:23:33,485 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:23:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:23:33,491 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-22 05:23:33,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:23:33,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072238898] [2020-12-22 05:23:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:23:33,596 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:23:33,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80772580] [2020-12-22 05:23:33,597 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 05:23:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:23:33,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 05:23:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:23:33,883 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 05:23:33,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072238898] [2020-12-22 05:23:33,885 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:23:33,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80772580] [2020-12-22 05:23:33,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:23:33,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:23:33,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325138502] [2020-12-22 05:23:33,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:23:33,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:23:33,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:23:33,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:23:33,909 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-12-22 05:23:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:23:34,002 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-12-22 05:23:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:23:34,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 05:23:34,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:23:34,014 INFO L225 Difference]: With dead ends: 44 [2020-12-22 05:23:34,014 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 05:23:34,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:23:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 05:23:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-12-22 05:23:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:23:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 05:23:34,054 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2020-12-22 05:23:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:23:34,055 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 05:23:34,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:23:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 05:23:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:23:34,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:23:34,056 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:23:34,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-22 05:23:34,270 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:23:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:23:34,272 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-22 05:23:34,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:23:34,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871876879] [2020-12-22 05:23:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:23:34,284 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:23:34,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412859521] [2020-12-22 05:23:34,285 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 05:23:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:23:34,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 05:23:34,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:23:34,532 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 05:23:34,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871876879] [2020-12-22 05:23:34,533 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:23:34,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412859521] [2020-12-22 05:23:34,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:23:34,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:23:34,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913871344] [2020-12-22 05:23:34,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:23:34,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:23:34,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:23:34,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:23:34,537 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2020-12-22 05:23:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:23:39,218 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-22 05:23:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:23:39,219 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-22 05:23:39,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:23:39,220 INFO L225 Difference]: With dead ends: 29 [2020-12-22 05:23:39,220 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 05:23:39,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:23:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 05:23:39,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2020-12-22 05:23:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 05:23:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-22 05:23:39,228 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2020-12-22 05:23:39,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:23:39,229 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-22 05:23:39,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:23:39,229 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-22 05:23:39,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:23:39,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:23:39,230 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:23:39,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:23:39,443 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:23:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:23:39,445 INFO L82 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2020-12-22 05:23:39,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:23:39,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773824114] [2020-12-22 05:23:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:23:39,457 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:23:39,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757927530] [2020-12-22 05:23:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:23:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:23:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:23:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:23:39,616 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 05:23:39,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773824114] [2020-12-22 05:23:39,617 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:23:39,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757927530] [2020-12-22 05:23:39,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:23:39,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:23:39,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347581887] [2020-12-22 05:23:39,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:23:39,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:23:39,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:23:39,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:23:39,620 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-12-22 05:23:39,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:23:39,666 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-22 05:23:39,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:23:39,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 05:23:39,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:23:39,668 INFO L225 Difference]: With dead ends: 23 [2020-12-22 05:23:39,668 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 05:23:39,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:23:39,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 05:23:39,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 05:23:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 05:23:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-22 05:23:39,675 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 11 [2020-12-22 05:23:39,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:23:39,675 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-22 05:23:39,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:23:39,676 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-22 05:23:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:23:39,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:23:39,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:23:39,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:23:39,891 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:23:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:23:39,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1997070616, now seen corresponding path program 1 times [2020-12-22 05:23:39,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:23:39,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712313066] [2020-12-22 05:23:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:23:39,908 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:23:39,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089233920] [2020-12-22 05:23:39,909 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 05:23:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:23:39,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:23:39,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:23:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 05:23:40,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712313066] [2020-12-22 05:23:40,112 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:23:40,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089233920] [2020-12-22 05:23:40,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:23:40,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:23:40,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43825770] [2020-12-22 05:23:40,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:23:40,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:23:40,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:23:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:23:40,116 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-12-22 05:23:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:23:44,246 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-22 05:23:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:23:44,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 05:23:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:23:44,249 INFO L225 Difference]: With dead ends: 23 [2020-12-22 05:23:44,249 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 05:23:44,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:23:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 05:23:44,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 05:23:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 05:23:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 05:23:44,264 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 13 [2020-12-22 05:23:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:23:44,264 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 05:23:44,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:23:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 05:23:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:23:44,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:23:44,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-12-22 05:23:44,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:23:44,467 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:23:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:23:44,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2020-12-22 05:23:44,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:23:44,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771201062] [2020-12-22 05:23:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:23:44,479 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:23:44,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947166408] [2020-12-22 05:23:44,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:23:44,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:23:44,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:23:44,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 05:23:44,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:23:46,719 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~z~0))) (and (let ((.cse0 (= (+ (* c_ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~x~0) c_ULTIMATE.start_main_~a~0) (+ (* c_ULTIMATE.start_main_~az~0 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~x~0)))) (or (and (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse0)))) (= c_ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~y~0) (= c_ULTIMATE.start_main_~x~0 (+ .cse1 c_ULTIMATE.start_main_~a~0)) (= c_ULTIMATE.start_main_~az~0 .cse1))) is different from false [2020-12-22 05:23:51,328 WARN L197 SmtUtils]: Spent 2.58 s on a formula simplification that was a NOOP. DAG size: 16 [2020-12-22 05:23:55,569 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 15 [2020-12-22 05:23:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-12-22 05:23:55,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771201062] [2020-12-22 05:23:55,600 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:23:55,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947166408] [2020-12-22 05:23:55,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:23:55,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:23:55,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42143789] [2020-12-22 05:23:55,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:23:55,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:23:55,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:23:55,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=40, Unknown=2, NotChecked=12, Total=72 [2020-12-22 05:23:55,603 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 9 states. [2020-12-22 05:24:15,987 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 18 [2020-12-22 05:24:20,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:24:20,115 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-12-22 05:24:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:24:20,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-22 05:24:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:24:20,117 INFO L225 Difference]: With dead ends: 33 [2020-12-22 05:24:20,117 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 05:24:20,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=26, Invalid=63, Unknown=5, NotChecked=16, Total=110 [2020-12-22 05:24:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 05:24:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-22 05:24:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 05:24:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-22 05:24:20,124 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 14 [2020-12-22 05:24:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:24:20,124 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-22 05:24:20,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:24:20,124 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-22 05:24:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:24:20,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:24:20,125 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:24:20,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:24:20,326 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:24:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:24:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 2 times [2020-12-22 05:24:20,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:24:20,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856910041] [2020-12-22 05:24:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:24:20,334 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:24:20,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066808215] [2020-12-22 05:24:20,335 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:24:20,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:24:20,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:24:20,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:24:20,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:24:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:24:20,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856910041] [2020-12-22 05:24:20,449 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:24:20,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066808215] [2020-12-22 05:24:20,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:24:20,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:24:20,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719655603] [2020-12-22 05:24:20,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:24:20,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:24:20,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:24:20,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:24:20,451 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-12-22 05:24:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:24:20,495 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-22 05:24:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:24:20,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 05:24:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:24:20,497 INFO L225 Difference]: With dead ends: 27 [2020-12-22 05:24:20,497 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:24:20,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:24:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:24:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 05:24:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 05:24:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 05:24:20,503 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 15 [2020-12-22 05:24:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:24:20,503 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 05:24:20,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:24:20,503 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 05:24:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:24:20,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:24:20,504 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2020-12-22 05:24:20,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:24:20,712 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:24:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:24:20,712 INFO L82 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2020-12-22 05:24:20,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:24:20,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450668638] [2020-12-22 05:24:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:24:20,728 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:24:20,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454539146] [2020-12-22 05:24:20,728 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:24:20,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 05:24:20,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:24:20,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:24:20,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:24:21,434 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:24:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 05:24:21,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450668638] [2020-12-22 05:24:21,494 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:24:21,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454539146] [2020-12-22 05:24:21,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:24:21,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:24:21,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467123934] [2020-12-22 05:24:21,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:24:21,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:24:21,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:24:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:24:21,497 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2020-12-22 05:24:34,426 WARN L197 SmtUtils]: Spent 8.27 s on a formula simplification that was a NOOP. DAG size: 40 [2020-12-22 05:24:42,646 WARN L197 SmtUtils]: Spent 8.20 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-22 05:24:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:24:42,683 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-22 05:24:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:24:42,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-22 05:24:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:24:42,685 INFO L225 Difference]: With dead ends: 23 [2020-12-22 05:24:42,685 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 05:24:42,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:24:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 05:24:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-22 05:24:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:24:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-22 05:24:42,693 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-22 05:24:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:24:42,693 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-22 05:24:42,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:24:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-22 05:24:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:24:42,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:24:42,694 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:24:42,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:24:42,895 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:24:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:24:42,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1808548489, now seen corresponding path program 3 times [2020-12-22 05:24:42,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:24:42,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224525590] [2020-12-22 05:24:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:24:42,917 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:24:42,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221761048] [2020-12-22 05:24:42,918 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true