/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:32:55,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:32:55,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:32:55,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:32:55,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:32:55,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:32:55,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:32:55,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:32:55,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:32:55,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:32:55,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:32:55,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:32:55,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:32:55,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:32:55,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:32:55,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:32:55,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:32:55,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:32:55,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:32:55,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:32:55,106 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 15:32:55,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:32:55,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:32:55,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:32:55,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:32:55,138 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:32:55,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:32:55,138 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:32:55,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:32:55,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:32:55,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:32:55,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:32:55,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:32:55,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:32:55,139 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:32:55,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:32:55,140 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:32:55,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:32:55,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:32:55,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:32:55,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:32:55,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:32:55,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:32:55,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:32:55,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:32:55,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:32:55,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:32:55,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:32:55,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:32:55,141 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:32:55,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:32:55,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:32:55,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:32:55,387 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:32:55,388 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:32:55,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c [2021-05-02 15:32:55,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/803ab3f41/048898c698cf467fa960820bc0c37845/FLAGc9076d6eb [2021-05-02 15:32:55,790 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:32:55,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound2.c [2021-05-02 15:32:55,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/803ab3f41/048898c698cf467fa960820bc0c37845/FLAGc9076d6eb [2021-05-02 15:32:56,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/803ab3f41/048898c698cf467fa960820bc0c37845 [2021-05-02 15:32:56,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:32:56,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:32:56,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:32:56,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:32:56,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:32:56,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:32:56" (1/1) ... [2021-05-02 15:32:56,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a9ff86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56, skipping insertion in model container [2021-05-02 15:32:56,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:32:56" (1/1) ... [2021-05-02 15:32:56,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:32:56,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:32:56,348 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_valuebound2.c[545,558] [2021-05-02 15:32:56,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:32:56,374 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:32:56,410 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_valuebound2.c[545,558] [2021-05-02 15:32:56,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:32:56,436 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:32:56,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56 WrapperNode [2021-05-02 15:32:56,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:32:56,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:32:56,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:32:56,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:32:56,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56" (1/1) ... [2021-05-02 15:32:56,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56" (1/1) ... [2021-05-02 15:32:56,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56" (1/1) ... [2021-05-02 15:32:56,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56" (1/1) ... [2021-05-02 15:32:56,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56" (1/1) ... [2021-05-02 15:32:56,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56" (1/1) ... [2021-05-02 15:32:56,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56" (1/1) ... [2021-05-02 15:32:56,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:32:56,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:32:56,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:32:56,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:32:56,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:32:56,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:32:56,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:32:56,549 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:32:56,549 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:32:56,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:32:56,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:32:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:32:56,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:32:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:32:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:32:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:32:56,550 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:32:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:32:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:32:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:32:56,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:32:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:32:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:32:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:32:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:32:56,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:32:56,769 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:32:56,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:32:56 BoogieIcfgContainer [2021-05-02 15:32:56,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:32:56,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:32:56,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:32:56,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:32:56,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:32:56" (1/3) ... [2021-05-02 15:32:56,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecab48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:32:56, skipping insertion in model container [2021-05-02 15:32:56,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:56" (2/3) ... [2021-05-02 15:32:56,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecab48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:32:56, skipping insertion in model container [2021-05-02 15:32:56,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:32:56" (3/3) ... [2021-05-02 15:32:56,774 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.c [2021-05-02 15:32:56,778 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:32:56,780 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:32:56,791 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:32:56,804 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:32:56,804 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:32:56,804 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:32:56,804 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:32:56,804 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:32:56,804 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:32:56,804 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:32:56,804 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:32:56,813 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) [2021-05-02 15:32:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:32:56,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:56,817 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] [2021-05-02 15:32:56,817 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:56,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:56,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-02 15:32:56,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:56,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505082259] [2021-05-02 15:32:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:32:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:32:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:32:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:32:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:32:57,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:57,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505082259] [2021-05-02 15:32:57,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505082259] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:32:57,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:32:57,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:32:57,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626467772] [2021-05-02 15:32:57,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:32:57,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:57,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:32:57,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:32:57,076 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) [2021-05-02 15:32:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:57,224 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-02 15:32:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:32:57,225 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 [2021-05-02 15:32:57,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:57,230 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:32:57,230 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:32:57,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:32:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:32:57,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:32:57,259 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) [2021-05-02 15:32:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 15:32:57,276 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 15:32:57,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:57,276 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 15:32:57,276 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) [2021-05-02 15:32:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 15:32:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:32:57,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:57,278 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] [2021-05-02 15:32:57,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:32:57,278 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-02 15:32:57,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:57,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895782624] [2021-05-02 15:32:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:32:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:32:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:32:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:32:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:32:57,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:57,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895782624] [2021-05-02 15:32:57,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895782624] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:32:57,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:32:57,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:32:57,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3327253] [2021-05-02 15:32:57,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:32:57,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:57,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:32:57,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:32:57,397 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) [2021-05-02 15:32:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:57,668 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:32:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:32:57,668 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 [2021-05-02 15:32:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:57,669 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:32:57,669 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:32:57,670 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:32:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:32:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 15:32:57,678 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) [2021-05-02 15:32:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:32:57,679 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 15:32:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:57,679 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:32:57,679 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) [2021-05-02 15:32:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:32:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:32:57,680 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:57,680 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] [2021-05-02 15:32:57,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:32:57,680 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-02 15:32:57,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:57,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432936890] [2021-05-02 15:32:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:32:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:32:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:32:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:32:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 15:32:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:32:57,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:57,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432936890] [2021-05-02 15:32:57,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432936890] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:32:57,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:32:57,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:32:57,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318833409] [2021-05-02 15:32:57,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:32:57,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:57,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:32:57,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:32:57,921 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) [2021-05-02 15:32:58,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:58,212 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 15:32:58,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:32:58,213 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 [2021-05-02 15:32:58,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:58,216 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:32:58,216 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:32:58,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:32:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:32:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 15:32:58,239 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) [2021-05-02 15:32:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 15:32:58,241 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 15:32:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:58,241 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 15:32:58,241 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) [2021-05-02 15:32:58,241 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 15:32:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:32:58,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:58,243 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] [2021-05-02 15:32:58,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:32:58,244 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:58,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:58,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-02 15:32:58,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:58,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961934553] [2021-05-02 15:32:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:58,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:32:58,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862644669] [2021-05-02 15:32:58,259 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 15:32:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:58,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:32:58,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:32:58,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 15:32:58,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:58,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961934553] [2021-05-02 15:32:58,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:32:58,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862644669] [2021-05-02 15:32:58,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862644669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:32:58,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:32:58,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:32:58,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790347401] [2021-05-02 15:32:58,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:32:58,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:58,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:32:58,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:32:58,491 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:32:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:58,604 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-02 15:32:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:32:58,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-02 15:32:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:58,606 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:32:58,607 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 15:32:58,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:32:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 15:32:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 15:32:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 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) [2021-05-02 15:32:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 15:32:58,623 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 15:32:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:58,624 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 15:32:58,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:32:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 15:32:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 15:32:58,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:58,627 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] [2021-05-02 15:32:58,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:32:58,843 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:58,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-02 15:32:58,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:58,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445145160] [2021-05-02 15:32:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:58,858 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:32:58,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358739278] [2021-05-02 15:32:58,859 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 15:32:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:58,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:32:58,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:32:58,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:58,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:58,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:58,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:58,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:58,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:58,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:58,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 15:32:59,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:59,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445145160] [2021-05-02 15:32:59,057 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:32:59,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358739278] [2021-05-02 15:32:59,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358739278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:32:59,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:32:59,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:32:59,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909470452] [2021-05-02 15:32:59,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:32:59,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:59,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:32:59,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:32:59,063 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 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) [2021-05-02 15:32:59,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:59,165 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-05-02 15:32:59,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:32:59,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 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 [2021-05-02 15:32:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:59,168 INFO L225 Difference]: With dead ends: 68 [2021-05-02 15:32:59,168 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 15:32:59,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:32:59,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 15:32:59,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 15:32:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:32:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-02 15:32:59,180 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 45 [2021-05-02 15:32:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:59,180 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-02 15:32:59,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 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) [2021-05-02 15:32:59,180 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-02 15:32:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:32:59,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:59,183 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] [2021-05-02 15:32:59,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:32:59,398 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:59,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-02 15:32:59,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:59,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007530564] [2021-05-02 15:32:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:59,406 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:32:59,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048395447] [2021-05-02 15:32:59,406 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 15:32:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:32:59,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:32:59,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:32:59,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:59,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007530564] [2021-05-02 15:32:59,805 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:32:59,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048395447] [2021-05-02 15:32:59,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048395447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:32:59,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:32:59,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:32:59,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885878389] [2021-05-02 15:32:59,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:32:59,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:59,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:32:59,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:32:59,808 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:33:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:00,033 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-05-02 15:33:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:33:00,033 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 15:33:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:00,035 INFO L225 Difference]: With dead ends: 85 [2021-05-02 15:33:00,035 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 15:33:00,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:33:00,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 15:33:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 15:33:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 15:33:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-05-02 15:33:00,044 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 55 [2021-05-02 15:33:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:00,044 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-05-02 15:33:00,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:33:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-05-02 15:33:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:33:00,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:00,045 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:33:00,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:33:00,249 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:00,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:00,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-02 15:33:00,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:00,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608923844] [2021-05-02 15:33:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:00,256 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:00,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802062550] [2021-05-02 15:33:00,256 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 15:33:00,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:33:00,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:33:00,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 15:33:00,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:00,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:03,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:03,201 WARN L159 QuantifierPusher]: Ignoring assumption.