/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-scaling/hard-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:23:41,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:23:41,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:23:41,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:23:41,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:23:41,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:23:41,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:23:41,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:23:41,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:23:41,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:23:41,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:23:41,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:23:41,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:23:41,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:23:41,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:23:41,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:23:41,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:23:41,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:23:41,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:23:41,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:23:41,851 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 [2021-05-06 03:23:41,877 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:23:41,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:23:41,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:23:41,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:23:41,880 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:23:41,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:23:41,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:23:41,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:23:41,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:23:41,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:23:41,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:23:41,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:23:41,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:23:41,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:23:41,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:23:41,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:23:41,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:23:41,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:23:41,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:23:41,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:23:41,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:23:41,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:23:41,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:23:41,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:23:41,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:23:41,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:23:41,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:23:41,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:23:41,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:23:42,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:23:42,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:23:42,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:23:42,273 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:23:42,275 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:23:42,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2021-05-06 03:23:42,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3da1fc888/3d080ff958f540fc85aa1245ad767ce9/FLAGb3e64d7d9 [2021-05-06 03:23:42,764 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:23:42,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2021-05-06 03:23:42,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3da1fc888/3d080ff958f540fc85aa1245ad767ce9/FLAGb3e64d7d9 [2021-05-06 03:23:43,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3da1fc888/3d080ff958f540fc85aa1245ad767ce9 [2021-05-06 03:23:43,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:23:43,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:23:43,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:23:43,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:23:43,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:23:43,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:23:43" (1/1) ... [2021-05-06 03:23:43,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df39ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43, skipping insertion in model container [2021-05-06 03:23:43,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:23:43" (1/1) ... [2021-05-06 03:23:43,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:23:43,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:23:43,260 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-scaling/hard-u_valuebound1.c[545,558] [2021-05-06 03:23:43,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:23:43,274 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:23:43,316 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-scaling/hard-u_valuebound1.c[545,558] [2021-05-06 03:23:43,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:23:43,341 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:23:43,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43 WrapperNode [2021-05-06 03:23:43,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:23:43,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:23:43,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:23:43,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:23:43,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43" (1/1) ... [2021-05-06 03:23:43,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43" (1/1) ... [2021-05-06 03:23:43,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43" (1/1) ... [2021-05-06 03:23:43,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43" (1/1) ... [2021-05-06 03:23:43,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43" (1/1) ... [2021-05-06 03:23:43,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43" (1/1) ... [2021-05-06 03:23:43,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43" (1/1) ... [2021-05-06 03:23:43,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:23:43,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:23:43,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:23:43,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:23:43,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43" (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 [2021-05-06 03:23:43,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:23:43,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:23:43,435 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:23:43,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:23:43,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:23:43,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:23:43,436 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:23:43,436 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:23:43,436 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:23:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:23:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:23:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:23:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:23:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:23:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:23:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:23:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:23:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:23:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:23:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:23:43,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:23:43,694 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:23:43,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:23:43 BoogieIcfgContainer [2021-05-06 03:23:43,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:23:43,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:23:43,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:23:43,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:23:43,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:23:43" (1/3) ... [2021-05-06 03:23:43,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b917b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:23:43, skipping insertion in model container [2021-05-06 03:23:43,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:23:43" (2/3) ... [2021-05-06 03:23:43,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b917b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:23:43, skipping insertion in model container [2021-05-06 03:23:43,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:23:43" (3/3) ... [2021-05-06 03:23:43,716 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.c [2021-05-06 03:23:43,721 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:23:43,725 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:23:43,755 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:23:43,788 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:23:43,788 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:23:43,788 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:23:43,788 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:23:43,788 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:23:43,788 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:23:43,788 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:23:43,788 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:23:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:23:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:23:43,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:23:43,814 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:23:43,815 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:23:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:23:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:23:43,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:23:43,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099849384] [2021-05-06 03:23:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:23:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:23:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:23:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:23:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:23:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:23:44,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:23:44,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099849384] [2021-05-06 03:23:44,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099849384] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:23:44,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:23:44,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:23:44,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530798800] [2021-05-06 03:23:44,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:23:44,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:23:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:23:44,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:23:44,108 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:23:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:23:44,266 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:23:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:23:44,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:23:44,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:23:44,273 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:23:44,273 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:23:44,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:23:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:23:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:23:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:23:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:23:44,320 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:23:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:23:44,320 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:23:44,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:23:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:23:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:23:44,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:23:44,322 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:23:44,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:23:44,323 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:23:44,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:23:44,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:23:44,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:23:44,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451167119] [2021-05-06 03:23:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:23:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:23:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:23:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:23:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:23:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:23:44,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:23:44,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451167119] [2021-05-06 03:23:44,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451167119] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:23:44,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:23:44,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:23:44,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33832229] [2021-05-06 03:23:44,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:23:44,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:23:44,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:23:44,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:23:44,442 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:23:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:23:44,719 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:23:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:23:44,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 03:23:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:23:44,720 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:23:44,720 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:23:44,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:23:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:23:44,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:23:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:23:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:23:44,729 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:23:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:23:44,729 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:23:44,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:23:44,729 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:23:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:23:44,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:23:44,730 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:23:44,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:23:44,730 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:23:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:23:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:23:44,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:23:44,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968257600] [2021-05-06 03:23:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:23:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:23:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:23:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:23:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:23:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:23:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:23:44,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:23:44,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968257600] [2021-05-06 03:23:44,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968257600] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:23:44,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:23:44,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:23:44,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617079600] [2021-05-06 03:23:44,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:23:44,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:23:44,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:23:44,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:23:44,866 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:23:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:23:45,099 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:23:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:23:45,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 03:23:45,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:23:45,100 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:23:45,100 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:23:45,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:23:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:23:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:23:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:23:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:23:45,107 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:23:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:23:45,107 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:23:45,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:23:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:23:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:23:45,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:23:45,108 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:23:45,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:23:45,108 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:23:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:23:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:23:45,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:23:45,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950112136] [2021-05-06 03:23:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:23:45,117 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:23:45,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659550590] [2021-05-06 03:23:45,117 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 [2021-05-06 03:23:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:45,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:23:45,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:23:45,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:23:45,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:23:45,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950112136] [2021-05-06 03:23:45,471 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:23:45,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659550590] [2021-05-06 03:23:45,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659550590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:23:45,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:23:45,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:23:45,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084282974] [2021-05-06 03:23:45,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:23:45,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:23:45,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:23:45,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:23:45,472 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:23:47,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:23:47,731 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-05-06 03:23:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:23:47,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-06 03:23:47,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:23:47,732 INFO L225 Difference]: With dead ends: 58 [2021-05-06 03:23:47,732 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 03:23:47,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:23:47,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 03:23:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 03:23:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 03:23:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 03:23:47,742 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 03:23:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:23:47,742 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 03:23:47,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:23:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 03:23:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:23:47,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:23:47,743 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:23:47,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:23:47,957 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:23:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:23:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:23:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:23:47,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140414418] [2021-05-06 03:23:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:23:47,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:23:47,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540888375] [2021-05-06 03:23:47,965 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 [2021-05-06 03:23:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:48,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:23:48,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:23:48,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 03:23:48,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:23:48,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140414418] [2021-05-06 03:23:48,252 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:23:48,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540888375] [2021-05-06 03:23:48,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540888375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:23:48,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:23:48,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:23:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510718670] [2021-05-06 03:23:48,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:23:48,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:23:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:23:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:23:48,253 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:23:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:23:48,531 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2021-05-06 03:23:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:23:48,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 03:23:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:23:48,534 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:23:48,534 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 03:23:48,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:23:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 03:23:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 03:23:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:23:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 03:23:48,544 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 03:23:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:23:48,544 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 03:23:48,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:23:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 03:23:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:23:48,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:23:48,546 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:23:48,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:23:48,753 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:23:48,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:23:48,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:23:48,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:23:48,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88728577] [2021-05-06 03:23:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:23:48,760 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:23:48,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933678881] [2021-05-06 03:23:48,760 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 [2021-05-06 03:23:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:23:48,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 03:23:48,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:23:48,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:48,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:23:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 03:23:49,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:23:49,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88728577] [2021-05-06 03:23:49,132 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:23:49,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933678881] [2021-05-06 03:23:49,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933678881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:23:49,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:23:49,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:23:49,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612402879] [2021-05-06 03:23:49,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:23:49,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:23:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:23:49,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:23:49,134 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:23:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:23:53,654 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-05-06 03:23:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:23:53,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 03:23:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:23:53,656 INFO L225 Difference]: With dead ends: 99 [2021-05-06 03:23:53,657 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 03:23:53,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:23:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 03:23:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 03:23:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 03:23:53,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 03:23:53,667 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 03:23:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:23:53,667 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 03:23:53,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:23:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 03:23:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 03:23:53,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:23:53,669 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:23:53,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:23:53,874 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:23:53,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:23:53,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2021-05-06 03:23:53,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:23:53,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994960040] [2021-05-06 03:23:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:23:53,881 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:23:53,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980876407] [2021-05-06 03:23:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true