/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps4-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:51:44,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:51:44,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:51:44,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:51:44,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:51:44,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:51:44,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:51:44,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:51:44,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:51:44,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:51:44,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:51:44,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:51:44,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:51:44,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:51:44,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:51:44,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:51:44,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:51:44,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:51:44,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:51:44,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:51:44,256 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 [2021-05-02 13:51:44,300 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:51:44,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:51:44,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:51:44,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:51:44,303 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:51:44,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:51:44,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:51:44,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:51:44,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:51:44,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:51:44,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:51:44,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:51:44,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:51:44,305 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:51:44,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:51:44,305 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:51:44,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:51:44,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:51:44,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:51:44,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:51:44,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:51:44,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:51:44,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:51:44,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:51:44,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:51:44,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:51:44,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:51:44,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:51:44,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:51:44,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:51:44,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:51:44,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:51:44,623 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:51:44,623 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:51:44,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4-ll.c [2021-05-02 13:51:44,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8524ed8fc/4b37d1729bd64dd0a9c42583747f18dd/FLAGa1e05858a [2021-05-02 13:51:45,063 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:51:45,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4-ll.c [2021-05-02 13:51:45,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8524ed8fc/4b37d1729bd64dd0a9c42583747f18dd/FLAGa1e05858a [2021-05-02 13:51:45,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8524ed8fc/4b37d1729bd64dd0a9c42583747f18dd [2021-05-02 13:51:45,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:51:45,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:51:45,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:51:45,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:51:45,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:51:45,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:51:45" (1/1) ... [2021-05-02 13:51:45,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bec0d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45, skipping insertion in model container [2021-05-02 13:51:45,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:51:45" (1/1) ... [2021-05-02 13:51:45,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:51:45,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:51:45,266 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4-ll.c[458,471] [2021-05-02 13:51:45,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:51:45,287 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:51:45,299 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4-ll.c[458,471] [2021-05-02 13:51:45,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:51:45,327 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:51:45,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45 WrapperNode [2021-05-02 13:51:45,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:51:45,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:51:45,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:51:45,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:51:45,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45" (1/1) ... [2021-05-02 13:51:45,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45" (1/1) ... [2021-05-02 13:51:45,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45" (1/1) ... [2021-05-02 13:51:45,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45" (1/1) ... [2021-05-02 13:51:45,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45" (1/1) ... [2021-05-02 13:51:45,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45" (1/1) ... [2021-05-02 13:51:45,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45" (1/1) ... [2021-05-02 13:51:45,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:51:45,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:51:45,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:51:45,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:51:45,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45" (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 [2021-05-02 13:51:45,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:51:45,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:51:45,493 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:51:45,493 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:51:45,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:51:45,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:51:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:51:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:51:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:51:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:51:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 13:51:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:51:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:51:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:51:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:51:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:51:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:51:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:51:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:51:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:51:45,747 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:51:45,747 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:51:45,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:51:45 BoogieIcfgContainer [2021-05-02 13:51:45,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:51:45,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:51:45,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:51:45,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:51:45,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:51:45" (1/3) ... [2021-05-02 13:51:45,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3c39e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:51:45, skipping insertion in model container [2021-05-02 13:51:45,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:45" (2/3) ... [2021-05-02 13:51:45,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3c39e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:51:45, skipping insertion in model container [2021-05-02 13:51:45,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:51:45" (3/3) ... [2021-05-02 13:51:45,755 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll.c [2021-05-02 13:51:45,759 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:51:45,762 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:51:45,776 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:51:45,807 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:51:45,807 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:51:45,807 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:51:45,808 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:51:45,808 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:51:45,808 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:51:45,808 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:51:45,808 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:51:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:51:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:51:45,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:45,834 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:45,834 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:45,838 INFO L82 PathProgramCache]: Analyzing trace with hash -973133132, now seen corresponding path program 1 times [2021-05-02 13:51:45,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:45,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148462327] [2021-05-02 13:51:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:46,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:51:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:46,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:46,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148462327] [2021-05-02 13:51:46,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148462327] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:46,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:46,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:51:46,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398395242] [2021-05-02 13:51:46,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:51:46,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:51:46,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:51:46,069 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:51:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:46,132 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-05-02 13:51:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:51:46,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:51:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:46,140 INFO L225 Difference]: With dead ends: 38 [2021-05-02 13:51:46,140 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 13:51:46,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:51:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 13:51:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 13:51:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:51:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 13:51:46,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 13:51:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:46,185 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 13:51:46,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:51:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 13:51:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:51:46,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:46,187 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:46,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:51:46,188 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:46,189 INFO L82 PathProgramCache]: Analyzing trace with hash -971345672, now seen corresponding path program 1 times [2021-05-02 13:51:46,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:46,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604261403] [2021-05-02 13:51:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:46,221 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:46,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856055981] [2021-05-02 13:51:46,222 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 [2021-05-02 13:51:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:46,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:51:46,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:46,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:46,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604261403] [2021-05-02 13:51:46,396 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:46,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856055981] [2021-05-02 13:51:46,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856055981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:46,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:46,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 13:51:46,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299933264] [2021-05-02 13:51:46,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:51:46,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:46,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:51:46,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:51:46,409 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:51:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:46,473 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 13:51:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:51:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:51:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:46,476 INFO L225 Difference]: With dead ends: 28 [2021-05-02 13:51:46,476 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 13:51:46,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:51:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 13:51:46,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 13:51:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:51:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 13:51:46,500 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2021-05-02 13:51:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:46,501 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 13:51:46,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:51:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 13:51:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 13:51:46,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:46,505 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:46,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:51:46,725 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:46,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1679137237, now seen corresponding path program 1 times [2021-05-02 13:51:46,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:46,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870976529] [2021-05-02 13:51:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:46,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:46,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134877007] [2021-05-02 13:51:46,734 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 [2021-05-02 13:51:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:46,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:51:46,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:46,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:46,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870976529] [2021-05-02 13:51:46,916 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:46,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134877007] [2021-05-02 13:51:46,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134877007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:46,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:46,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:51:46,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998687536] [2021-05-02 13:51:46,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:51:46,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:51:46,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:51:46,918 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:51:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:52,749 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 13:51:52,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:51:52,750 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 13:51:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:52,751 INFO L225 Difference]: With dead ends: 35 [2021-05-02 13:51:52,751 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 13:51:52,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:51:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 13:51:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 13:51:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:51:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 13:51:52,759 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-02 13:51:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:52,759 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 13:51:52,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:51:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 13:51:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 13:51:52,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:52,760 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:52,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:52,980 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1991962395, now seen corresponding path program 1 times [2021-05-02 13:51:52,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:52,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985032770] [2021-05-02 13:51:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:52,989 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:52,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375612886] [2021-05-02 13:51:52,989 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 [2021-05-02 13:51:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:53,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:51:53,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:53,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:53,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:30,398 WARN L205 SmtUtils]: Spent 36.09 s on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-05-02 13:52:30,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:30,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:30,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:30,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:30,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:30,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:30,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:52:35,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:35,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985032770] [2021-05-02 13:52:35,587 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:35,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375612886] [2021-05-02 13:52:35,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375612886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:35,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:35,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:52:35,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477323029] [2021-05-02 13:52:35,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:52:35,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:35,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:52:35,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=87, Unknown=1, NotChecked=0, Total=110 [2021-05-02 13:52:35,589 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:52:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:35,743 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-02 13:52:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:52:35,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-05-02 13:52:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:35,748 INFO L225 Difference]: With dead ends: 38 [2021-05-02 13:52:35,749 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 13:52:35,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 42396.5ms TimeCoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2021-05-02 13:52:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 13:52:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 13:52:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:52:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-02 13:52:35,767 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2021-05-02 13:52:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:35,768 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-02 13:52:35,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:52:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-02 13:52:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:52:35,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:35,769 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:35,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:35,985 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1593261672, now seen corresponding path program 2 times [2021-05-02 13:52:35,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:35,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308202359] [2021-05-02 13:52:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:35,992 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:35,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647665214] [2021-05-02 13:52:35,992 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 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 [2021-05-02 13:52:36,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:52:36,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:52:36,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:52:36,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:52:36,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:36,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308202359] [2021-05-02 13:52:36,268 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:36,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647665214] [2021-05-02 13:52:36,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647665214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:36,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:36,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:52:36,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728221472] [2021-05-02 13:52:36,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:52:36,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:36,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:52:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:52:36,270 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:52:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:38,433 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-02 13:52:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:52:38,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-05-02 13:52:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:38,435 INFO L225 Difference]: With dead ends: 42 [2021-05-02 13:52:38,435 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 13:52:38,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:52:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 13:52:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 13:52:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:52:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-05-02 13:52:38,444 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2021-05-02 13:52:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:38,445 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-05-02 13:52:38,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:52:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-05-02 13:52:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 13:52:38,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:38,446 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:38,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:38,666 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:38,666 INFO L82 PathProgramCache]: Analyzing trace with hash 486172306, now seen corresponding path program 2 times [2021-05-02 13:52:38,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:38,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697917689] [2021-05-02 13:52:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:38,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:38,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798846406] [2021-05-02 13:52:38,675 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 [2021-05-02 13:52:38,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:52:38,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:52:38,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 13:52:38,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:38,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:38,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:38,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:38,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:38,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:38,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:38,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:38,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:38,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:52:38,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:38,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697917689] [2021-05-02 13:52:38,874 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:38,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798846406] [2021-05-02 13:52:38,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798846406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:38,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:38,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:52:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779026791] [2021-05-02 13:52:38,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:52:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:38,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:52:38,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:52:38,876 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:52:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:39,022 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-05-02 13:52:39,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:52:39,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2021-05-02 13:52:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:39,026 INFO L225 Difference]: With dead ends: 45 [2021-05-02 13:52:39,026 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 13:52:39,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:52:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 13:52:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 13:52:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:52:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 13:52:39,033 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2021-05-02 13:52:39,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:39,033 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 13:52:39,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:52:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 13:52:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:52:39,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:39,034 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:39,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 13:52:39,249 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2080497269, now seen corresponding path program 3 times [2021-05-02 13:52:39,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:39,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597042595] [2021-05-02 13:52:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:39,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:39,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128634842] [2021-05-02 13:52:39,257 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 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