/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:47:54,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:47:54,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:47:54,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:47:54,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:47:54,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:47:54,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:47:54,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:47:54,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:47:54,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:47:54,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:47:54,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:47:54,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:47:54,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:47:54,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:47:54,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:47:54,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:47:54,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:47:54,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:47:54,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:47:54,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:47:54,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:47:54,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:47:54,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:47:54,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:47:54,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:47:54,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:47:54,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:47:54,545 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 [2020-07-19 21:47:54,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:47:54,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:47:54,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:47:54,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:47:54,570 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:47:54,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:47:54,571 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:47:54,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:47:54,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:47:54,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:47:54,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:47:54,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:47:54,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:47:54,573 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:47:54,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:47:54,574 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:47:54,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:47:54,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:47:54,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:47:54,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:47:54,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:47:54,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:47:54,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:47:54,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:47:54,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:47:54,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:47:54,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:47:54,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:47:54,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:47:54,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:47:54,893 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:47:54,914 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:47:54,919 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:47:54,920 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:47:54,921 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:47:54,922 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo1.c [2020-07-19 21:47:55,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c20e4213b/2008b0aa560c40efb7e1310c08ec8cf4/FLAGe6da59072 [2020-07-19 21:47:55,532 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:47:55,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo1.c [2020-07-19 21:47:55,541 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c20e4213b/2008b0aa560c40efb7e1310c08ec8cf4/FLAGe6da59072 [2020-07-19 21:47:55,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c20e4213b/2008b0aa560c40efb7e1310c08ec8cf4 [2020-07-19 21:47:55,912 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:47:55,915 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:47:55,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:47:55,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:47:55,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:47:55,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:47:55" (1/1) ... [2020-07-19 21:47:55,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761e7545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:55, skipping insertion in model container [2020-07-19 21:47:55,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:47:55" (1/1) ... [2020-07-19 21:47:55,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:47:55,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:47:56,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:47:56,145 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:47:56,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:47:56,181 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:47:56,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:56 WrapperNode [2020-07-19 21:47:56,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:47:56,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:47:56,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:47:56,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:47:56,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:56" (1/1) ... [2020-07-19 21:47:56,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:56" (1/1) ... [2020-07-19 21:47:56,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:56" (1/1) ... [2020-07-19 21:47:56,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:56" (1/1) ... [2020-07-19 21:47:56,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:56" (1/1) ... [2020-07-19 21:47:56,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:56" (1/1) ... [2020-07-19 21:47:56,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:56" (1/1) ... [2020-07-19 21:47:56,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:47:56,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:47:56,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:47:56,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:47:56,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:56" (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 [2020-07-19 21:47:56,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:47:56,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:47:56,374 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:47:56,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:47:56,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:47:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:47:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:47:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:47:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:47:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:47:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:47:56,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:47:56,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:47:56,577 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:47:56,577 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 21:47:56,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:47:56 BoogieIcfgContainer [2020-07-19 21:47:56,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:47:56,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:47:56,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:47:56,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:47:56,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:47:55" (1/3) ... [2020-07-19 21:47:56,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1516c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:47:56, skipping insertion in model container [2020-07-19 21:47:56,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:56" (2/3) ... [2020-07-19 21:47:56,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1516c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:47:56, skipping insertion in model container [2020-07-19 21:47:56,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:47:56" (3/3) ... [2020-07-19 21:47:56,590 INFO L109 eAbstractionObserver]: Analyzing ICFG geo1.c [2020-07-19 21:47:56,601 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:47:56,609 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:47:56,623 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:47:56,648 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:47:56,649 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:47:56,649 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:47:56,649 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:47:56,649 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:47:56,650 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:47:56,650 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:47:56,650 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:47:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-19 21:47:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:47:56,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:56,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:56,675 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:56,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:56,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1923958992, now seen corresponding path program 1 times [2020-07-19 21:47:56,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:56,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009429369] [2020-07-19 21:47:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 [2020-07-19 21:47:56,771 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:47:56,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648802154] [2020-07-19 21:47:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 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 [2020-07-19 21:47:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:56,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:47:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:47:56,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009429369] [2020-07-19 21:47:56,975 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:47:56,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648802154] [2020-07-19 21:47:56,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:47:56,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:47:56,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408057711] [2020-07-19 21:47:56,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:47:56,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:57,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:47:57,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:47:57,012 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-19 21:47:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:57,136 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2020-07-19 21:47:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:47:57,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-19 21:47:57,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:57,148 INFO L225 Difference]: With dead ends: 45 [2020-07-19 21:47:57,149 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 21:47:57,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:47:57,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 21:47:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-19 21:47:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-19 21:47:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-19 21:47:57,194 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-19 21:47:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:57,195 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-19 21:47:57,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:47:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-19 21:47:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 21:47:57,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:57,197 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:57,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-19 21:47:57,407 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1187633082, now seen corresponding path program 1 times [2020-07-19 21:47:57,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:57,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827990128] [2020-07-19 21:47:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 [2020-07-19 21:47:57,418 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:47:57,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520613807] [2020-07-19 21:47:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 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 [2020-07-19 21:47:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:57,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:47:57,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:57,647 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:47:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:47:57,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827990128] [2020-07-19 21:47:57,731 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:47:57,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520613807] [2020-07-19 21:47:57,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:47:57,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-19 21:47:57,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665461076] [2020-07-19 21:47:57,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:47:57,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:57,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:47:57,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:47:57,736 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-07-19 21:48:00,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:00,142 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-07-19 21:48:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:48:00,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-19 21:48:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:00,146 INFO L225 Difference]: With dead ends: 28 [2020-07-19 21:48:00,147 INFO L226 Difference]: Without dead ends: 20 [2020-07-19 21:48:00,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:48:00,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-19 21:48:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-19 21:48:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-19 21:48:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-19 21:48:00,156 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-07-19 21:48:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:00,157 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-19 21:48:00,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:48:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-19 21:48:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 21:48:00,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:00,158 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:00,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:00,372 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:00,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1235596592, now seen corresponding path program 1 times [2020-07-19 21:48:00,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:00,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117935059] [2020-07-19 21:48:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 [2020-07-19 21:48:00,383 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:00,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62806566] [2020-07-19 21:48:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 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 [2020-07-19 21:48:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:00,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 21:48:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:48:00,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117935059] [2020-07-19 21:48:00,502 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:00,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62806566] [2020-07-19 21:48:00,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:00,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-19 21:48:00,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472290951] [2020-07-19 21:48:00,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:48:00,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:00,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:48:00,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:48:00,505 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2020-07-19 21:48:00,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:00,626 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-07-19 21:48:00,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:48:00,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-19 21:48:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:00,629 INFO L225 Difference]: With dead ends: 30 [2020-07-19 21:48:00,629 INFO L226 Difference]: Without dead ends: 28 [2020-07-19 21:48:00,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:48:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-19 21:48:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-19 21:48:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 21:48:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-19 21:48:00,640 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-07-19 21:48:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:00,640 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-19 21:48:00,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:48:00,641 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-19 21:48:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 21:48:00,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:00,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:00,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:00,858 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:00,859 INFO L82 PathProgramCache]: Analyzing trace with hash -677841104, now seen corresponding path program 2 times [2020-07-19 21:48:00,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:00,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237192491] [2020-07-19 21:48:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 [2020-07-19 21:48:00,868 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:00,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960950712] [2020-07-19 21:48:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 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 [2020-07-19 21:48:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:00,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:48:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:07,114 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-19 21:48:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:48:07,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237192491] [2020-07-19 21:48:07,284 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:07,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960950712] [2020-07-19 21:48:07,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:07,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-19 21:48:07,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610499329] [2020-07-19 21:48:07,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:48:07,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:48:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2020-07-19 21:48:07,287 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 10 states. [2020-07-19 21:48:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:20,350 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-19 21:48:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:48:20,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-07-19 21:48:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:20,353 INFO L225 Difference]: With dead ends: 37 [2020-07-19 21:48:20,353 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 21:48:20,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2020-07-19 21:48:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 21:48:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-19 21:48:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-19 21:48:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-19 21:48:20,361 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-19 21:48:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:20,362 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-19 21:48:20,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:48:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-19 21:48:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 21:48:20,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:20,363 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:20,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:20,565 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:20,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1339520304, now seen corresponding path program 3 times [2020-07-19 21:48:20,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:20,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805538] [2020-07-19 21:48:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 [2020-07-19 21:48:20,573 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:20,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353661635] [2020-07-19 21:48:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 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 [2020-07-19 21:48:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:48:20,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:21,192 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:48:43,275 WARN L193 SmtUtils]: Spent 12.36 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-19 21:48:43,278 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:49:10,813 WARN L193 SmtUtils]: Spent 14.15 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-19 21:49:12,914 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:49:21,134 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~x~0_16 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_16))) (and (= (+ .cse0 1) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_16)) (not (= (+ .cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_16))))))) is different from false [2020-07-19 21:49:23,145 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~x~0_16 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_16))) (and (= (+ .cse0 1) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_16)) (not (= (+ .cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_16))))))) is different from true [2020-07-19 21:49:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 15 refuted. 1 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-19 21:49:23,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805538] [2020-07-19 21:49:23,150 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:49:23,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353661635] [2020-07-19 21:49:23,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:49:23,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-19 21:49:23,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087436824] [2020-07-19 21:49:23,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:49:23,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:49:23,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=4, NotChecked=18, Total=132 [2020-07-19 21:49:23,153 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 12 states. [2020-07-19 21:49:49,195 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~x~0_16 Int)) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_16))) (and (= (+ .cse1 1) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_16)) (not (= (+ .cse1 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_16))))))))) (and (or (and .cse0 (<= 0 |c___VERIFIER_assert_#in~cond|)) (<= 1 |c___VERIFIER_assert_#in~cond|)) (or (and .cse0 (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond))) is different from false [2020-07-19 21:49:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:49:55,257 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-07-19 21:49:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:49:55,258 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-07-19 21:49:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:49:55,259 INFO L225 Difference]: With dead ends: 44 [2020-07-19 21:49:55,260 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 21:49:55,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=28, Invalid=107, Unknown=5, NotChecked=42, Total=182 [2020-07-19 21:49:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 21:49:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-19 21:49:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-19 21:49:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-07-19 21:49:55,270 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 31 [2020-07-19 21:49:55,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:49:55,270 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-07-19 21:49:55,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:49:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-07-19 21:49:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 21:49:55,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:49:55,272 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:49:55,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:49:55,481 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:49:55,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:49:55,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1980811472, now seen corresponding path program 4 times [2020-07-19 21:49:55,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:49:55,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363612813] [2020-07-19 21:49:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 [2020-07-19 21:49:55,490 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:49:55,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926421818] [2020-07-19 21:49:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 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 [2020-07-19 21:49:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:49:55,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 21:49:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:49:57,764 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:50:03,940 WARN L838 $PredicateComparison]: unable to prove that (or (<= 1 |c___VERIFIER_assert_#in~cond|) (and (<= 0 |c___VERIFIER_assert_#in~cond|) (exists ((v_main_~z~0_BEFORE_CALL_15 Int) (v_main_~x~0_17 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_15 v_main_~x~0_17))) (and (not (= (+ (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15) .cse0) (+ (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~x~0_17) v_main_~z~0_BEFORE_CALL_15))) (= (+ v_main_~x~0_17 (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15)) (+ .cse0 1))))))) is different from false [2020-07-19 21:50:03,945 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:50:33,518 WARN L193 SmtUtils]: Spent 14.30 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-19 21:50:35,585 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:50:43,782 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_15 Int) (v_main_~x~0_17 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_15 v_main_~x~0_17))) (and (not (= (+ (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15) .cse0) (+ (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~x~0_17) v_main_~z~0_BEFORE_CALL_15))) (= (+ v_main_~x~0_17 (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15)) (+ .cse0 1))))) is different from false [2020-07-19 21:50:45,792 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_15 Int) (v_main_~x~0_17 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_15 v_main_~x~0_17))) (and (not (= (+ (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15) .cse0) (+ (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~x~0_17) v_main_~z~0_BEFORE_CALL_15))) (= (+ v_main_~x~0_17 (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15)) (+ .cse0 1))))) is different from true [2020-07-19 21:50:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 21:50:45,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363612813] [2020-07-19 21:50:45,799 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:50:45,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926421818] [2020-07-19 21:50:45,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:50:45,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-19 21:50:45,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556213580] [2020-07-19 21:50:45,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:50:45,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:50:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:50:45,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=88, Unknown=6, NotChecked=38, Total=156 [2020-07-19 21:50:45,802 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 13 states. [2020-07-19 21:51:04,385 WARN L838 $PredicateComparison]: unable to prove that (and (or (and (<= 0 c___VERIFIER_assert_~cond) (exists ((v_main_~z~0_BEFORE_CALL_15 Int) (v_main_~x~0_17 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_15 v_main_~x~0_17))) (and (not (= (+ (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15) .cse0) (+ (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~x~0_17) v_main_~z~0_BEFORE_CALL_15))) (= (+ v_main_~x~0_17 (* v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_15)) (+ .cse0 1)))))) (<= 1 c___VERIFIER_assert_~cond)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond)) is different from false [2020-07-19 21:51:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:51:11,707 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-07-19 21:51:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:51:11,724 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-07-19 21:51:11,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:51:11,726 INFO L225 Difference]: With dead ends: 51 [2020-07-19 21:51:11,726 INFO L226 Difference]: Without dead ends: 49 [2020-07-19 21:51:11,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=30, Invalid=107, Unknown=7, NotChecked=66, Total=210 [2020-07-19 21:51:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-19 21:51:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-19 21:51:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 21:51:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-07-19 21:51:11,745 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2020-07-19 21:51:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:51:11,746 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-07-19 21:51:11,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:51:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-07-19 21:51:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-19 21:51:11,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:51:11,749 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:51:11,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:51:11,965 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:51:11,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:51:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1141295824, now seen corresponding path program 5 times [2020-07-19 21:51:11,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:51:11,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824249771] [2020-07-19 21:51:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 [2020-07-19 21:51:11,974 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:51:11,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886946359] [2020-07-19 21:51:11,974 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49aee326 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