/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:29:42,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:29:42,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:29:42,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:29:42,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:29:42,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:29:42,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:29:42,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:29:42,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:29:42,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:29:42,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:29:42,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:29:42,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:29:42,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:29:42,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:29:42,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:29:42,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:29:42,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:29:42,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:29:42,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:29:42,573 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 03:29:42,593 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:29:42,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:29:42,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:29:42,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:29:42,595 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:29:42,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:29:42,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:29:42,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:29:42,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:29:42,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:29:42,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:29:42,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:29:42,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:29:42,597 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:29:42,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:29:42,597 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:29:42,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:29:42,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:29:42,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:29:42,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:29:42,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:29:42,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:29:42,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:29:42,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:29:42,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:29:42,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:29:42,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:29:42,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:29:42,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:29:42,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:29:42,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:29:42,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:29:42,949 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:29:42,950 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:29:42,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c [2021-05-06 03:29:43,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cedf649dc/cac1ed34c8a747d4a7484f0828c975bd/FLAG75316bd2e [2021-05-06 03:29:43,508 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:29:43,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c [2021-05-06 03:29:43,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cedf649dc/cac1ed34c8a747d4a7484f0828c975bd/FLAG75316bd2e [2021-05-06 03:29:43,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cedf649dc/cac1ed34c8a747d4a7484f0828c975bd [2021-05-06 03:29:43,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:29:43,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:29:43,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:29:43,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:29:43,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:29:43,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:29:43" (1/1) ... [2021-05-06 03:29:43,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62cad774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:43, skipping insertion in model container [2021-05-06 03:29:43,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:29:43" (1/1) ... [2021-05-06 03:29:43,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:29:44,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:29:44,115 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_valuebound5.c[545,558] [2021-05-06 03:29:44,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:29:44,137 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:29:44,154 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_valuebound5.c[545,558] [2021-05-06 03:29:44,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:29:44,204 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:29:44,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:44 WrapperNode [2021-05-06 03:29:44,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:29:44,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:29:44,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:29:44,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:29:44,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:44" (1/1) ... [2021-05-06 03:29:44,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:44" (1/1) ... [2021-05-06 03:29:44,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:44" (1/1) ... [2021-05-06 03:29:44,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:44" (1/1) ... [2021-05-06 03:29:44,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:44" (1/1) ... [2021-05-06 03:29:44,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:44" (1/1) ... [2021-05-06 03:29:44,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:44" (1/1) ... [2021-05-06 03:29:44,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:29:44,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:29:44,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:29:44,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:29:44,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:44" (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 03:29:44,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:29:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:29:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:29:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:29:44,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:29:44,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:29:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:29:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:29:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:29:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:29:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:29:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:29:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:29:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:29:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:29:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:29:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:29:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:29:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:29:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:29:44,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:29:44,669 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:29:44,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:29:44 BoogieIcfgContainer [2021-05-06 03:29:44,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:29:44,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:29:44,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:29:44,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:29:44,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:29:43" (1/3) ... [2021-05-06 03:29:44,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6954f61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:29:44, skipping insertion in model container [2021-05-06 03:29:44,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:44" (2/3) ... [2021-05-06 03:29:44,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6954f61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:29:44, skipping insertion in model container [2021-05-06 03:29:44,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:29:44" (3/3) ... [2021-05-06 03:29:44,677 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound5.c [2021-05-06 03:29:44,684 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:29:44,688 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:29:44,703 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:29:44,733 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:29:44,733 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:29:44,733 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:29:44,733 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:29:44,733 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:29:44,733 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:29:44,733 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:29:44,734 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:29:44,751 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 03:29:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:29:44,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:44,757 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 03:29:44,757 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:44,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:29:44,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:44,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732711506] [2021-05-06 03:29:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:29:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:29:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:29:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:29:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,097 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 03:29:45,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:45,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732711506] [2021-05-06 03:29:45,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732711506] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:29:45,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:29:45,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:29:45,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691645266] [2021-05-06 03:29:45,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:29:45,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:45,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:29:45,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:29:45,124 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 03:29:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:45,247 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:29:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:29:45,249 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 03:29:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:45,255 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:29:45,255 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:29:45,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:29:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:29:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:29:45,294 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 03:29:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:29:45,297 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:29:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:45,297 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:29:45,297 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 03:29:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:29:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:29:45,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:45,299 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 03:29:45,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:29:45,300 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:45,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:29:45,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:45,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275960095] [2021-05-06 03:29:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:29:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:29:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:29:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:29:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,411 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 03:29:45,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:45,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275960095] [2021-05-06 03:29:45,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275960095] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:29:45,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:29:45,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:29:45,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296781483] [2021-05-06 03:29:45,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:29:45,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:45,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:29:45,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:29:45,415 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 03:29:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:45,708 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:29:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:29:45,708 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 03:29:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:45,709 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:29:45,710 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:29:45,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:29:45,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:29:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:29:45,721 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 03:29:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:29:45,722 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:29:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:45,723 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:29:45,723 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 03:29:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:29:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:29:45,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:45,724 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 03:29:45,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:29:45,724 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:45,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:29:45,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:45,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889510191] [2021-05-06 03:29:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:29:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:29:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:29:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:29:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:29:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:45,909 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 03:29:45,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:45,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889510191] [2021-05-06 03:29:45,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889510191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:29:45,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:29:45,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:29:45,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987968334] [2021-05-06 03:29:45,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:29:45,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:45,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:29:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:29:45,912 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 03:29:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:46,261 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:29:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:29:46,262 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 03:29:46,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:46,270 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:29:46,270 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:29:46,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:29:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:29:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:29:46,294 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 03:29:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:29:46,295 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:29:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:46,295 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:29:46,296 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 03:29:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:29:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:29:46,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:46,303 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 03:29:46,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:29:46,304 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:46,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:29:46,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:46,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750259751] [2021-05-06 03:29:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:46,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:29:46,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097101838] [2021-05-06 03:29:46,327 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 03:29:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 03:29:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:29:46,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:46,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:46,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:46,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:46,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:46,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:46,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:46,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:46,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 03:29:46,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:46,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750259751] [2021-05-06 03:29:46,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:29:46,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097101838] [2021-05-06 03:29:46,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097101838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:29:46,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:29:46,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:29:46,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117154419] [2021-05-06 03:29:46,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:29:46,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:46,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:29:46,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:29:46,731 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:29:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:49,169 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-05-06 03:29:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:29:49,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 03:29:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:49,172 INFO L225 Difference]: With dead ends: 64 [2021-05-06 03:29:49,172 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 03:29:49,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:29:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 03:29:49,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 03:29:49,186 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 03:29:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 03:29:49,188 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 03:29:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:49,188 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 03:29:49,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:29:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 03:29:49,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:29:49,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:49,190 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 03:29:49,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:29:49,409 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:49,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:49,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:29:49,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:49,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837242223] [2021-05-06 03:29:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:49,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:29:49,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750022158] [2021-05-06 03:29:49,424 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 03:29:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:49,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:29:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:29:49,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:49,811 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 03:29:49,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:49,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837242223] [2021-05-06 03:29:49,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:29:49,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750022158] [2021-05-06 03:29:49,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750022158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:29:49,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:29:49,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:29:49,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592345612] [2021-05-06 03:29:49,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:29:49,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:49,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:29:49,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:29:49,814 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 03:29:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:50,133 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2021-05-06 03:29:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:29:50,134 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 03:29:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:50,136 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:29:50,136 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 03:29:50,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:29:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 03:29:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 03:29:50,148 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 03:29:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 03:29:50,150 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 03:29:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:50,150 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 03:29:50,151 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 03:29:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 03:29:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:29:50,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:50,152 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 03:29:50,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:29:50,369 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:29:50,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:50,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038332754] [2021-05-06 03:29:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:50,385 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:29:50,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979646832] [2021-05-06 03:29:50,386 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 03:29:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 03:29:50,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:29:50,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:50,854 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 03:29:50,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:50,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038332754] [2021-05-06 03:29:50,855 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:29:50,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979646832] [2021-05-06 03:29:50,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979646832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:29:50,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:29:50,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:29:50,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332705572] [2021-05-06 03:29:50,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:29:50,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:50,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:29:50,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:29:50,856 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 03:29:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:55,571 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-05-06 03:29:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:29:55,572 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 03:29:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:55,575 INFO L225 Difference]: With dead ends: 99 [2021-05-06 03:29:55,575 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 03:29:55,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:29:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 03:29:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 03:29:55,588 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 03:29:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 03:29:55,589 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 03:29:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:55,590 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 03:29:55,590 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 03:29:55,590 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 03:29:55,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 03:29:55,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:55,591 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 03:29:55,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:29:55,800 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:55,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2021-05-06 03:29:55,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:55,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147998307] [2021-05-06 03:29:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:55,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:29:55,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086022902] [2021-05-06 03:29:55,814 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